Determining method and device for sedimentary body main object source direction, medium and equipment

Abstract

The invention relates to a method and device for determining the direction of a main object source of a sedimentary body, a medium and equipment. The determining method comprises the steps that the position of an object source injection opening of the sedimentary body and the advancing direction of the sedimentary body are determined according to an ancient geomorphic map of the sedimentary body; any seismic section is extracted at equal intervals on the three-dimensional seismic work area along the advancing direction of the sedimentary body by taking the position of the object source injection port of the sedimentary body as a starting point; flattening the top surface of the sedimentary body on any seismic section to obtain a top surface flattening line; the elevation H and the horizontal distance L of each pre-lamination layer are obtained for each seismic section; and according to the elevation and the horizontal distance of each pre-build-up layer, calculating a pre-build-up angle alpha of each seismic section, and finally calculating to obtain a maximum pre-build-up angle alpha max, namely the main object source direction of the sedimentary body. The method is simple and convenient in calculation and easy to realize, and can intuitively, effectively and quantitatively represent the main source direction of the sedimentary body.

Description

technical field [0001] The invention relates to a method, device, medium and equipment for determining the main provenance direction of a sedimentary body, and belongs to the technical field of marine oil and gas exploration and development. Background technique [0002] In sedimentary facies analysis, determining the main provenance direction of sedimentary bodies is an important basic work, which is crucial for determining the sediment dispersion system and predicting the distribution of sand bodies. Provenance analysis is a method to determine the source of sediment by inferring the characteristics of the provenance area by using various data information and methods. The analysis of the ancient provenance system can determine the location, properties, and sediment transport channels of the provenance area, predict the paleocurrent system, and then judge the distribution of sedimentary facies belts and sediment dispersion system, so as to reconstruct the evolution process ...

AI Technical Summary

Problems solved by technology

However, in the past, when using the seismic foreset structure to carry out provenance direction judgment, most of them used the phase-surface method for qualitative analysis, and lacked a set of effective methods for quantitatively characterizing the main provenance direction of sedimentary bodies, resulting in inaccurate predictions

In addition, some people have proposed various calculation methods for the front product angle, but the application is cumbersome and the operability is not strong

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